How to Create a Homemade Weed Killer Without Chemicals That Actually Works

It's frustrating but true: A perfectly manicured lawn can actually make your grass more vulnerable to weeds. Dandelions, crabgrass, and nearly any plant with seeds love to invade cleanly cut grass and aesthetically designed gardens.

One effective way to prevent these unwelcome plants is by mowing less frequently. In fact, the belief that grass should always be kept as short as possible is a common lawn care myth. 'Let the grass grow a bit longer, so it takes more time for seeds to penetrate the soil,' advises Leslie Reichert, founder of Green Cleaning Coach.

Chances are, you'll need some form of weed control as part of your lawn care routine. Here are some effective methods for creating your own natural weed killer that gets the job done without relying on harsh chemicals.

Considerations Before You Begin

While there are some natural commercial weed killers, like Green Gobbler's 20% Vinegar formula, you might still need to revert to the old-fashioned, hands-on method of manually pulling weeds. 'Sometimes, you can't precisely control where the weed killer spreads when sprayed,' says Reichert. 'If you're worried about brown patches in your lawn, a weed puller and a bucket could be your most effective solution.'

What You Will Need

Materials

Instructions

How to Create a Natural Homemade Weed Killer Using Vinegar and Borax

Step 1: Mix the Ingredients

Pour vinegar, Borax, and dish soap into a spray bottle, ensuring the nozzle is adjustable to switch between a spray or stream setting.

Step 2: Apply the Solution to Your Lawn

For a small patch, direct a stream of the solution. For larger areas with widespread weeds, use the spray setting. But don't overdo it: 'Use caution,' Reichert advises. 'It can't distinguish between weeds and flowers.' Particularly with Borax, a naturally occurring substance that doesn't harm ecosystems or absorb through the skin, the solution can harm the soil, preventing anything else from growing nearby.

This method is most effective on sunny days, as the natural acid in the solution will scorch the plant, and the salt will cause it to wilt by evening. (The dish soap helps the mixture cling to the weeds.)

Using Newspaper to Kill Weeds

Even professional landscapers frequently use this simple, all-natural approach to eliminate weeds.

Step 1: Use a Weed Trimmer

If your garden is overrun, grab a weed trimmer to target the offenders.

Step 2: Lay Down Newspaper

Newspapers prevent weeds from sprouting and new seeds from growing by blocking sunlight and air.

Step 3: Apply Mulch

Finish with a layer of mulch, and the weeds won't stand a chance, Reichert advises. Plus, the newspaper will naturally decompose over time, so you won’t have to worry about cleaning up.

How to Use Boiling Water to Kill Weeds

For a truly DIY solution: this method is low-cost, straightforward, effective, and completely free of chemicals.

Step 1: Pour Boiling Water Over the Weeds

For areas like cracks in your driveway or sidewalk, boil some water and pour it directly onto the weeds. This will immediately kill them, says Reichert. Make sure to pour carefully and close to the plant to avoid splashes.

Step 2: Repeat as Necessary

Since this method isn't permanent, repeat the process whenever the weeds reappear until the area is cleared. (Boiling water won’t kill weeds at their roots, explains Chris McGeary, chief marketing officer at Lawn Doctor, a lawn care company.) And remember to take safety precautions to avoid burns.

How to Use Lemon Juice to Kill Weeds

This lovely fruit doesn't just belong in your garden; it also helps maintain its beauty, as lemon juice acts as a natural acid that kills weeds.

Step 1: Apply Lemon Juice to the Weeds

Fill a spray bottle with fresh lemon juice and generously apply it to the weeds—the natural solution will dry out and kill the leaves within one to two days. If you don’t have fresh lemons in your backyard, ReaLemon from the store works just as well.

Step 2: Mix in Vinegar

For a more powerful formula, combine the lemon juice with acidic vinegar. The vinegar sold at garden centers or nurseries is more potent than the type you find in supermarkets, allowing you to make a stronger homemade weed killer if needed.

Frequently Asked Questions

• What is the most effective homemade weed killer?

  The best homemade weed killer combines dish soap, white vinegar, and salt. These three ingredients work together to eliminate weeds in specific ways. Vinegar and salt contain acetic acid, which dries out the weeds, while dish soap serves as a surfactant, helping the 'killing' agent stay on the surface of the plant, where it’s most effective.

• What method kills weeds for good?

  Boiling water kills weeds at the root. While other natural solutions like vinegar also kill the roots, it takes much longer. Boiling water eliminates weed roots almost instantly.